#include<stdio.h>
#include<string.h>
int main(int argc, const char *argv[])
{
	char str[] = "hello";
	int *p=NULL;
	printf("指针大小%ld\n",sizeof(p));
	printf("%lu\n",strlen(str));
	printf("%ld\n",sizeof(str)/sizeof(char));
	return 0;
}
